Answer:

Step-by-step explanation:
The number exceeds 21 or is greater than 21.
‘
’ represents greater than.
Let the number be
.

Step-by-step explanation:
Answer:30. hope this helps
Answer:
Juan believes the answer is -2/15.
Step-by-step explanation:
The given problem is :

We need to solve the problem.

So, the answer to the problem is
. Hence, Juan is correct.
the one on the bottom left
Area of a square = length²
A = x²
16 = x²; x = 4
dA/dx = 2x cm²/s
dx/dt = 6 cm/s
Using chain rule:
dA/dt = dA/dx * dx/dt
dA/dt = 2x * 6
dA/dt = 12x
At x = 4,
dA/dt = 12(4) = 48 cm²/s